MultipartFile转化为byte数组
byte[] bytes= file.getBytes();
byte数组转化为MultipartFile
<dependency> <groupId>org.springframework</groupId> <artifactId>spring-test</artifactId> <version>RELEASE</version> </dependency>
byte[] bytes = message.getPacket(); InputStream inputStream = new ByteArrayInputStream(bytes); MultipartFile file = new MockMultipartFile(ContentType.APPLICATION_OCTET_STREAM.toString(), inputStream);